I know. But I find it actually quite easy to get rid of lightly worn children clothes, and donate them. Mostly informal networks, but a lot of more formal exchanges as well. e.g. also includes car seats, strollers, ...

> And I’ve heard rumors that adults change size quite a bit as well.

Tell me about it. But I was able to trade my nicer stuff (suits, shirts) no problem. Not the junk.